Research on the Dynamic Mechanical Properties and Constitutive Models of Steel Fiber Reinforced Concrete and Polypropylene Fiber Reinforced Concrete
Table 7
Damage parameters of PFRC.
Specimen number
m
a × 10−3
εq × 10−3
a-n-1
1.45 × 10−4
1.131
1.37
1.88
a-n-2
5.24 × 10−3
1.164
1.34
1.92
a-n-3
1.20 × 10−2
1.262
0.96
1.94
a-n-4
4.50 × 10−2
1.332
0.75
1.95
a-n-5
1.00 × 10−1
1.309
1.01
1.98
b-p-1
1.45 × 10−4
1.453
0.24
2.02
b-p-2
5.24 × 10−3
1.252
0.87
2.03
b-p-3
1.20 × 10−2
1.179
1.38
2.08
b-p-4
4.50 × 10−2
1.148
1.72
2.11
b-p-5
1.00 × 10−1
1.148
2.03
2.16
c-p-1
1.45 × 10−4
1.372
0.85
2.32
c-p-2
5.24 × 10−3
1.320
0.75
2.37
c-p-3
1.20 × 10−2
1.238
1.22
2.45
c-p-4
4.50 × 10−2
1.291
1.01
2.47
c-p-5
1.00 × 10−1
1.244
1.40
2.48
d-p-1
1.45 × 10−4
1.055
2.76
2.62
d-p-2
5.24 × 10−3
1.035
3.48
2.65
d-p-3
1.20 × 10−2
1.026
3.93
2.70
d-p-4
4.50 × 10−2
1.105
2.77
2.74
d-p-5
1.00 × 10−1
1.116
2.78
2.80
Note: is the strain rate. m and a are material constants, which are related to the fiber content, the ratio of length to diameter, the strength of plain concrete, and the strain rate. εq is the threshold strain of material cumulative damage.
